Tsunami warnings are long enough for you to get high
up,
but your never sure if its high enough. So use the
Tsunami
Lifesaver Backpack.

Strap it on like a harness with a backpack. Anchor the
rope
anywhere that seems it will hold. If the situation gets
really frightening pull out the
safety pin, and tug at the
"PULL THIS IN EMERGENCY" orange ribbon.

Bam! A balloon inflates and you can allow yourself as
high
up as you wish. If things go really bad, and the house is
pulled down, simply pull the next rope, and you begin
soaring in the air. You have at least 2 hours, and can
direct yourself in the different winds, letting out gas to
lower yourself when over safe ground.

A helium refill after false alarm would cost around $200.

It could also work on a battery and hot air.

For an extra fee, a helicopter company from somewhere
inland (on the volcano for example) will get signaled, and
will come and throw you a rope to safety.

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On second thought, besides personal backpacks, it would
be a good thing for the fire brigade to have several
emergency inflatable balloons to get people down from
high rise buildings...

I would like a third rope to pull which in addition to flying around would let me shoot spurts of holy meteors, with which to fight those scorpion-horse lady critters that sting anyone not scooped up in the Rapture. In case that is the direction things are going. I understand that option might cost extra.